Damper



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H; H. B. VINCENT.

'DAMPEIL Patented July 14, 1885.

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Deuren ASimfree PATENT OFFICE.

HENRY H. B. VINCENT, OF MINNEAPOLIS, MINNESOTA.

DAMPER..

SPECIFICATION forming part of Letters Patent No. 322,403, dated Jul)l 14, 1885.

Application filed February 9, 1885. (No model.)

To all whom t may con/cern:

Be it known that I, HENRY H. B. VINCENT, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Dampers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improvement in stovedampers, and the objects I have in view are to provide a simple and inexpensive damper that may be readily inserted in a stove-pipe and may be clamped so as to be held in any position.

My invention consists in the construction and combination of devices hereinafter described, and particularly pointed out in the claim.

In the drawings, Figure 1 is a'section of a stove-pipe with my damper in position. Fig. 2 is a vertical section of the damper.

B, in the drawings, represents an ordinary stove-pipe. A is the damper plate. It is preferably of the shape shown in the drawings,

having a series of openings, a2 a2, around its edge, which permit a retarded draft when the damper is closed and cause the products of combustion tov pass the damper close to the inner surface of the pipe, thereby heating the pipe, whose surface will then radiate considerable heat into the room where it is located. This plate is provided with the offsets a3 a3 and a4, which forms an opening for the damperrod in the usual manner. The damper-rod O is provided with a lug, c, which, when the rod is in position, fits into a notch in the end of the offset a4- and secures the plate to the rod and causes it to be turned thereby.

In order that the rod may be readily inserted or removed, the plate A is provided with the openings a a, as seen in Fig. l. When the rod is to be inserted, the end opposite the handle is slid under the offset a3 and over a4 until lug o strikes the odset a4. The rod is then turned to the left and lug c turned up through the opening a and brought above the offset a4. The rod is then advanced till the lug c strikes the oset a3. The rod is then turned to carry the' lug through the opening a and drawn back till the lug engages the notch in offset a4. "Io remove the rod the above operation is reversed. Outside the pipe B is the square or polygonal portion Oof the rod G, andthe end of the rod is screw-threaded,

as shown at C3. Y

D is the handle, which may be cast in one piece or may be made of two pieces of malleable metal, riveted together. This handle has a square or other polygonal opening through it, adapted to fit the'portion O' of rod C, and of sufficient size for the handle to slide freely thereon. There is also an opening, D', in the handle D, as shown in Fig. l, into which the threaded end of the rod extends. A nut, F, lit-s upon the screw-threaded end of the rod and bears .against the handle D within the opening Dl It will be seen from this construction that the handle D may be clamped against the pipe by the nut F with any desired amount of force, and that the lug c cannot be disengaged from the notch in the oi'set a4 untilthe nut is loosened on the rod. The handle D is also provided with the curved lugs G3 G3, which hold a wooden turning-handle, E.`

The plate of handle D projects within the lugs C3 G3, as shown at O4, in Fig. 2, and indicated in Fig. 1. The handle E is provided with a groove, E', which-fits over the projection O4, and this projection and groove materially aid the lugs O3 C3 in holding the wooden handle in place. It is obvious that this handle and rod may be used with other dampers than that here shown, and that other means may be used for securing the damper to the rod.

I claim- The combination, with the damper-rod C, having polygonal portion C and the threaded end G2, of the handle D, having an opening adapted to fit the portion G of rod C and to permit the handle to slide thereon, and having the opening D and the nut F, all substantially as described.

i HENRY H. B. VINCENT.

Witnesses:

" A. C. PAUL,

A. D. STOWELL. 

